The Birthright Series [Partlow]

Caleb Mitchell gave up everything to protect his home. Shunned by friends and family for abandoning the pacifist beliefs of their religion, abandoned by the love of his life, he left his home world of Canaan to go to the Commonwealth Military Academy on Earth and train to fight in the looming war against the implacable alien threat of the Tahni Imperium. When a training mission with a crew of cadets winds up caught in the middle of one of the worst battles of the war, Cal and his fellow students are officially declared dead.

Caleb Mitchell is a human weapon, engineered into a biologically-enhanced killing machine in the war with the alien Tahni. The war is long over and now he just wants to live a normal life as a constable on his homeworld of Canaan...but his life is torn apart when a Corporate Council mineral scout comes to him with a tale of discovering incredibly advanced alien technology from the fabled race known only as the Predecessors. Someone in the monolithic, power-hungry Corporate Council doesn't want that story to get out...and they'll kill anyone to stop it.

Former military super-commando Cal Mitchell is enjoying the pastoral life on his remote star colony home of Canaan, having put the fight against the Corporate Council behind him. But his past comes back to haunt him when a hired assassin makes an attempt on his life. On the heels of this threat, his old friend and former partner Deke Conner and DSI agent Kara McIntire arrive to warn him of a new conspiracy by old enemies, and this time the stakes are no lower than the fate of the galaxy. The hunt is on for the fabled Northwest Passage.

Caleb Mitchell, Deke Conner, and Kara McIntire return in the latest novel in the star-spanning Birthright series. Travelling back from their mission to the Northwest Passage, having closed off that corridor into our part of space to alien invasion, Cal Mitchell and his friends are now faced by a threat closer to home. When the former DSI commando Robert Chang, known as Cutter, had deceived them into helping him find the legendary Northwest Passage, he'd used all of his resources for his set-up.